Thread-cutting machine.



E. RILEY.

THREAD CUTTING MAGHINE.

APPLIOATION FILED AUG. 31, 1912.

Patented Sept. 9, 191 s.

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llll II II II II II II ll'll II I! ll H H H II II VI llll llllllllll IIII II II" II Inventor Attorneys E. RILEY.

THREAD CUTTING MACHINE.

APPLICATION FILED AUG. 31;, 1912.

72 503 Patented Sept. 9, 1913.

3 SHEETS-SHEET 2. v

Inventor x a, a

A tcorneys E. RILEY.

THREAD CUTTING MACHINE.

APPLIOATION FILED AUG. 31, 1912.

' 1 972,503, I Patented Sept. 9, 1913.

3 SHEETS-SHEET}.

EnwARD RILEY, or SPOKANE, WASHINGTON.

THREAD-CUTTING MAoHiNE;

Specification of Letters Patent.

Patented Sept. 9, i913;

Application filed August 81, 1912. Serial No. 718,153.

To all whom it may concern: Be it known that I, EDWARD RILEY, a citizen of the United States, residing at Spokane, in the county of Spokane and State of Washington, have invented a new and useful Thread-Cutting Machine, of which the following is a specification.

This invention relates to thread cutting machines.

The primary object of the invention is to provide a machine of this character in which both ends of the stock may be threaded from a common drive, means being provided for forming either right or. left hand threads on either end of the stock.

A further object of the invention is to provide-means for driving the cutting members by power or by hand.

A still further object of the invention is to provide means for moving one of the heads longitudinally of the machine frame to accommodate various lengths of stock and to thread the same at various points.

Another object of the invention is to provide means for feeding the other head a lim- 7 ited distance on the frame and locking the same against movement.

A further object of the invention is to provide a driving mechanism for the cutting members in which the direction of either or both may be readily changed.

A still further object ofthe invent-ion is to provide a cutting member in which the dies may be readily brought into contact with the stock.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of invention herein disclosed can .be made within the scope of what is claimed without'departtional view of the right hand head. Fig; 7 is a transverse section showing the vise which is arranged on the frame, between the heads, and which may be used as a cutter. Fig. 8 is a detail view showing the cutters which may be substituted in lieu of the grip-, ping dies shown in Fig. 7

In the drawings, 10 designates the machine frame which is supported by legs 11, said legs being connected by a plurality of angle bars 12 which support shelves on.

wvhich tools may be placed. The frame 10 is formed on either side with a rack 14 on which the'heads which will. be hereinafter described are arranged to travel.

The heads are provided with rotary cut-: ters which may be driven by hand or by power. These cutters are driven by the shafts 15 and 16 which are disposed longitudinally of the machine frame 10 and supported by the ends of said frame in bearings 17. The' shaft 15 is provided adjacent both of its ends with a pinion 18 which is splined on the shaft and may be moved lon-,

gitudinallyof the same. Normally these pinions mesh-with the rotary cutters of the.

head and rotate both of the same to form right or left hand threads as the case may be. The driven shaft 16 is provided to change the direction of rotation of either drive, the gear 19 is splined on the normally idle shaft 16, this gear 19 being of a width about twice as great as the width of of the cutters. In carrying out this form of.

the stoclieither both right hand or both left hand according to the direction in which the shaft is driven. When it is desired to drive one of the cutters in a direction the reverse of the other to .form a left hand thread on one end. of the stock and a right hand thread on the other, the gear 18 adjacent the cutter, the direction of rotation of which it is desired to change, is moved out of mesh with the gear 20 of the cutter and into mesh with the gear-19 which issplined on the shaft 16, the gear 19 being moved to a point where the same meshes with the gear 18 and the gear 20. The gear 18 thus transmits movement to the gear 19 which is in mesh with the gear 20 driving sald gear in a directlon reverse to that in movement to the gear 18.

ment by the manipulation of the gears 18 and 19.

The heads differ in construction, the head 21 at the left of the machine being arranged to move longitudinally of the machine frame to accommodate various lengths of stock 7 and to thread the stock at different points.

This head is illustrated in Figs. 5 and 6 and consists of a casing 22 which is formed with a tubular extension 24 which supports the stock. This extension receives the sleeve 25 of a 'cutter headwhich is housed by the circular casing-22. This sleeve which is double diametered is provided with a flange 27 to which is bolted the gear 20 (this construction being common in both right and left hand heads the two heads differentiating more particularly in the mechanism by which the same are slid longitudinally of the machine frame). nism consists of three lugs 29, which are ofiset from and have their terminals bolted to the gear 20. The plate or annular member 28 is held by the lugs 29 for oscillation, and is provided with the plate or flange 32 which is further provided -with the four cam grooves 30. The annular member 28 is formed with the exterior flange 31 at one end, and this forms the means whereby the annular member is properly held against outward movement by the lugs '29. The cutters 33 are mounted between the outer end of the sleeve 25 and the inner face of the plate or flange 32 within the annular member 28, each cutting member being provided with a pin 35 which extends outwardly into its respective cam groove 30. A lever 36 is connected to the annular member 28, so that when said lever is operated to oscillate the member 28, the cutting members 33 are projected into work engaging position or retracted therefrom. V

The left hand cutter head is designed as before stated to move longitudinally of the machine frame. This feeding of the cutter head 011 said frame is accomplished by means of the pinions 40 which are mounted on the shaft 41, said shaft being supported by the bearings 42 of the left hand head 21, the pinions 40 engaging the racks 14 of the machine frame. The shaft 41 is manipulated by the lever 43 said shaft being rotated, to

. feed the heads longitudinally of the machine frame, this construction being illustrated in detail in Fig. 4 of the drawing.

the drawing. A shaft. 45 passes trans- The cutting .Iaechaversely through the right hand head, said shaft being supported by bearings 46 in the same manner as the shaft 41 on which the pinions 40 of the left hand head is supported.

A 'luralit of ears 47 are arran 'ed on this.

P y :3 s

shaft- 45, to mesh with the racks 14 of the machine frame. l/Vhen it is desired to move the head 44 longitudinally of the machine the shaft 45 is rotated, the gears 47 feeding the head along the frame.

The vise 49 illustrated in detail Fig. 'I of the drawing consists of the frame 50 the base of which is provided with flanges V the vise is used merely as a work support,

to support the work between the cutter heads, the gripping dies 58 are supported by the jaws 56 and 57. When the vise is used as a cutting member the rotary cutter shown in detail in Fig. 8 of the drawings is substituted for the dies 58.

The drive shaft 15 is provided 'at a point adjacent the right hand side of the frame with a worm gear 60 which is arranged to mesh with the worm 61 mounted on the shaft 62 which is supported by the right hand head which is provided with bearings 63 which supportthe same. The shaft 15 is driven by means of the shaft 62 or the same may project as shown in Figs. 1 and 2 of the drawings from the right hand end of the 'machineand be rotated by a crank or by power. hen the shaft 16 is driven through the medium of the shaft 62, the shaft 62 is either provided with a pulley 64 arranged on the terminal 65 of the shaft or a crank may be attached to the terminal 66 of the shaft. It will be noted that as the shaft 6 2 is rotated the same will drive the shaft 16 through the medium of the worm gear 60 and the worm 61 arranged on the shaft 62.

The many advantages of a machine of this character will be clearly apparent as it will be noted that the same with slight adjustment, may be arranged to cut threads in either direction onboth ends of the stock and that the stock maybe threaded at any point throughout its length, the same being'sup ported "intermediate the cutting members by a work supportwhich may be converted into a cutting member.

What is claimed is A thread cutter including a plurality of on the driven shaft, a gear carried by each s of the cutters the pinion er the drive shaft When in engagement With said gears driving my own, Ihave hereto aflixed my signature 7 the same in one direction, the pinion of the in the presence of two'witnesses. driven shaft. being disposed to mesh with either of the other pinions, and the gear of EDWARD RILEY an adjacent cutter to reverse the movement of the same.

In testimony that I claim the foregoing as Witnesses: 7

WM. C. POWELL, H. E. RATZLAFI.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. r 

